“Octagonal bipyramid”的意思、由来-开放百科全书

词条

Octagonal bipyramid

释义

Images
Related polyhedra
External links

{{Infobox face-uniform polyhedron |

  Image_File=Octagonal bipyramid.png |  Polyhedron_Type=bipyramid |  Coxeter={{CDD|node_f1|2|node_f1|8|node}}
{{CDD|node_f1|2|node_f1|4|node_f1}}|  Schläfli = { } + {8} |  Face_List=16 triangles|  Edge_Count=24 |  Vertex_Count=10 |  Symmetry_Group=''D''_8h, [8,2], (*228), order 32|  Rotation_Group  = ''D''_''8'', [8,2]⁺, (228), order 16 |  Face_Type=V4.4.8|  Dual=octagonal prism|  Property_List=convex, face-transitive

}}

The octagonal bipyramid is one of the infinite set of bipyramids, dual to the infinite prisms. If an octagonal bipyramid is to be face-transitive, all faces must be isosceles triangles. 16-sided dice are often octagonal bipyramids.

Images

It can be drawn as a tiling on a sphere which also represents the fundamental domains of [4,2], *422 symmetry:

Related polyhedra

External links

{{mathworld | urlname = Dipyramid | title = Dipyramid}}
Virtual Reality Polyhedra The Encyclopedia of Polyhedra
- VRML models <8>
- Conway Notation for Polyhedra Try: dP8

2 : Polyhedra|Pyramids and bipyramids

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